Pendulum-scale



E. C. POOL. PENDULUM SCALE. APPLICATION HLED MAR. 29. 3918.

Patented Jan. 6, 1920.

ELMER C. IOOL, OF NEW CESTLE, PE'JBENSYLVMJIA, AEJEIGNOR E0 TOLEDO SCALE GGMPAN'Y, OF TOLEDO, SE10, A COEPQRATION ()3? NE??? 3' EENDULUIiE-SEALE.

Application filed March 2&3. 151s.

To all whom it may concern:

Be it known that l, ELMER U. POOL, a citizen of the United States, residing at slew Castle, in the county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Pendulum- Scales, of which the following is a spec1fication.

This invention relates to improvements in automatic weighing scales of the pendulum type, and particularly to counter scales 6., scales of relatively small capacity adapted to rest on counters in stores, shops, and like places.

Among the principal objects of this lIlVGI]: tion are the provision of a pendulum scale having a low platform resting upon a main lever directly connected with the pendulum, the use in such a lOW platform scale of a pew dulum that is normally pendent, and the adantation in a counter scale of a pendulum having its fulcrum bearing inverted.

A further object. is the prorisiou of a practical pendulum scale having a main lever in which the pivots supporting the platform and the pendulum are, contrary to the usual practice, out of alinement with the fulcrum pivots. 1n the present invention the pendulum supporting pivots are placed inn horizontal plume considerably above that of the platform-Si!pportiug and tulcrum pivots in the lever.

A further object is to provide a scale n'icchauism that is simple, inexpensive and eflicieut, and that can be quickly assembled into a compact counter scale.

With the above and other objects iuview which will readily appear as the invention. is better understood, my invention consists in the novel construction. combination and arrangement of parts to be hereinafter more broken away, of one form of scale embodying my improvement-s therein;

specification of Letters ."etent.

J! an, 6, 3%20.

Serial No. 225.4%.

Fig. 2 is a deteil elevation of the pendulum and associated parts 3' 3 is a detail sectional View taken substantially on the line of Fig. i;

Fig. 4 is a detail plan view thereof and Fig. 5 is a. detail plan View of the main lever.

in the drawings 1 have shown one Wellknown type of counter scales by way oft-example, wherein a cylinder or drum bearing a peripheral chart on which is inscribed suitable weightend price computations 1's rotatably mounted in a housing above the.

i. In the illustrated embodiment the numeral 5 designates the base of the scale upon which is supported a housing (3 adapted to inclose the pendulum Weighing mechanism of the scale and which in turn supports a casing 7 inclosin'g the cylinder 8 bearing the weight and value indications. The base 5 carries low supports 9 for the fulcrum pivots 10 of the main lover or scale beam 11, upon which rests the commodity-receiviug platform 12 whereby the platform is spaced :1 very short distance above the counter upon which the scale is supported. As herein shown, the scale beam 11 is formed as a lever of the first order, the plat-form being supported on the opposite side of the fulcrum hearing from that carrying the connections to the loadotfsctting pendulum 18. Inwardly of the platform the scale beam 11 enters the housing (3 through a suitable aperture therein and bends sharply upward to form the long vcrti *al arm 11, the upper end of Which is bent rcerwardly and carries the pivots 1 through which connection is made with the pendulum 1. The eii'ect of this is to make the main lever an angled or bell-crank lever, contrary to the usual practice of scale manufacturers. Through an arm 15 the main arcuate cam 21 adjustably carried by the pendulum and its other end to a cievis engaging the pivots 14 or. the main lover. The adjustable fulcrum stand for the pen-- (lllllllll is herein shown as provided with standards 19 grooved adjacent its upper extremity for the reception of the bearing bracket 19* having a bolt 19 threaded into an adjusting nut 19 (see Fig. 3), a locking nut 19 being provided to hold. the bearing bracket in any desired position.

A suitable check link, as 23, may be provided for maintaining the platform 12 in level position, and suitable damping means, as the dash pct 2%, may be connected with the weighing mechanism to check undue oscillation during the weighing operation.

in the operation of the scale, a commodity placed on the platforn'i 12 will depress the arm of the main lever on which the platform is supported, and elevate the opposite arm to which the pendulum is connected, the pivot 14. in such nain lever swinging on an ar with the fulcrum pivots 10 of the main lever as its cen The upwardswinging'movement of this portion of the scale lever exerts a pull upon the flexible ribbon 20 and through it elevates the pendulum 13 to a position of?- setting the weight oi the con'unodity upon the scale platform. Simultaneously the upward movement of the arm 15 elevates the rack rod 16 to indicate through the cylinder 8 the weight of such commodity.

While it will be apparent that the illustrated embodiment of my invention herein disclosed well calli-ulated to adequately fulfil the objects primarily stated, it is to be understood that the invention is suscep tiblo to variation, modification and change without departing from the spirit and scope of the invention as set forth in the subjoined claims.

Having described my invention, 1 claim:

1. In a weighing scale, a pendulum, a main lover, a platform resting upon the lever, connections from the lever to actuate the pcudulzuu, the lever connection with the pendulum being in plane above that of the lever connections to the platform and the fulcrum pivots, indicating mechanism leas es including a pinion, and a rack rod tin driving the pinion connected with the lever in the same horizontal plane as the lever con nections to the platform and fulcrum.

2. In a weighing scale, a base, a main lever fulcruined thereon, a pendulum, connections from the pendulum to pivots in the lever, a platform resting upon pivots in the lever, the pivots connected with the .penduluri being in a plane some distance above the plane of the fulcrum and platform-supporting pivots of the lever, indicating mechanism including a pinion anda rack rod for driving the pinion connected with the lever in the same horizontal plane as the lever connections to the platform and fulcrum.

3. In a weighing scale, abase, a main lever fulcrumed thereon, having a portion extending upwardly to a point well above the fulcrum pivots, a platform supported upon pivots carried by the lever in horizontal alinement with the fulcrum pivots thereof, a pendulum fulcrumed upon the bas c and connected with the lever in a horizontal plane some distance above the plane of the fulcrum and platfo'rn'i-supporting pi v0t ,in-

dicating mechanism including a pinion, and a rack rod tor driving the pinion connected with the lever in the same horizontal plane as the lever connections to the platform and fulcrum.

l. In a weighing scale and in combination with the indicating mechanism thereof, a base, a main lever fulcrumed thereon, having a portion extending upwardly to a point well above the fulcrum pivots, a platform supported upon pivots carried by the lever in horizontal alinement with the fulcrum pivots thereof, a pendulum having upwardly-extending fulcrum pivots, inverted bearings for said pendulum pivots carried by the base, and connections for swinging the pendulum from the main lever arranged above the horizontal plane of the fulcrum and kniioodge pivots of the lever.

In a weighing scale and in combination with the indicating,mechanism thereof, a base, a main lever fulcrui'ned thereon, having a portion extending upwardly to a point well above the fulcrum pivots, a platform supported upon pivots carried by the lever in horizontal ahnement with the'fulcrum pivots thereof, a pendulum having upwardly-extending fulcrum pivots, inverted bearings for said pendulum pivots carried by the base, and means for vertically adj usting said bearings.

- ELMER C. POOL. Witnesses MILDRED Ronnirrs, MONT L. AILEY, 

